Answer:
∠ BAD = 10°
Explanation:
The inscribed angle BAD is half the measure of the central angle BCD, then
∠ BAD = × 20° = 10°
10°
180-20 = 160
<BCA = 160°
AC=CB because its Radius
so the angle for <CBA and <BAD also the same
(180 - 160) ÷ 2 = <BAD
<BAD = 10°
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